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采用高温气相色谱分析了越南、阿曼和大庆原油中蜡的碳数及分布组成,采用偏光显微镜观察了不同蜡含量原油的蜡晶形态变化时,分析了蜡结晶过程中的结构、分布状态和生长规律与不同原油组成的关系,得出了蜡结晶过程与原油组成之间的变化规律。结合采用X射线衍射仪和DSC差示扫描量热仪对自制聚合物(MOA)的结晶度和热性能的分析测试,表明原油中蜡晶结构与聚合物的结晶度密切相关,结晶度变化时,蜡晶分散效果有所区别,两者匹配状态时分散效果最佳,体系的粘温特性研究也证明了这一点。同时,降凝剂使得系统的热性能——溶解焓和溶解熵均发生了改变,原油中石蜡的熔程变长,相变能变大。
The carbon number and distribution of wax in Vietnam, Oman and Daqing crude oil were analyzed by high temperature gas chromatography. The wax crystal morphology of crude oil with different wax content was observed by polarized light microscope. The structure, distribution and growth of wax Law and the relationship between the composition of different crude oil, drawn wax crystallization process and the composition of crude oil changes between. Combined with X-ray diffraction and DSC differential scanning calorimetry analysis of the crystallinity and thermal properties of self-made polymer (MOA), the results show that the wax crystal structure in crude oil is closely related to the crystallinity of the polymer. When the crystallinity changes , Wax dispersion effect is somewhat different, the two best match when the dispersion effect of the viscosity temperature characteristics of the system also proved this point. At the same time, the pour point depressant makes the system’s thermal properties - dissolved enthalpy and dissolved entropy have changed, the crude oil paraffin melting longer, the phase transformation can become larger.